Arrangement for stripping material from the lower run of the conveyor belt of a belt conveyor

Abstract

An arrangement for stripping material from the lower run of the conveyor belt includes scrapers divided into groups, arranged over the width of the conveyor belt and lying resiliently elastically against the underside of the lower run. The scrapers are arranged obliquely to the direction of travel of the lower run. The scrapers of a first group are oriented angled relative to the scrapers of an adjacent second group. The arrangement provides for each scraper to be supported at least indirectly on the supporting frame of the belt conveyor via at least two wound leg springs. Each respective leg spring is connected by its upper end to a front or rear end portion of the scraper, and is connected rotatably by its lower end to a transverse strut of a supporting frame.

The invention claimed is: 
     
       1. An arrangement for stripping material from a lower run of a conveyor belt of a belt conveyor, the arrangement comprising:
 scrapers divided into groups distributed over a width of the conveyor belt, and lying resiliently elastically against an underside of the lower run, 
 wherein scrapers are arranged obliquely to a direction of travel of the lower run, 
 wherein the scrapers of a first group are oriented angled relative to the scrapers of an adjacent second group, 
 wherein each respective scraper is supported at least indirectly on a supporting frame of the belt conveyor via at least two wound leg springs, 
 wherein each respective leg spring is connected by its upper end to a front or rear, in the direction of travel, end portion of the scraper, 
 wherein each respective leg spring is connected rotatably by its lower end to a transverse strut of the supporting frame mounted on the supporting structure of the belt conveyor, and 
 wherein each respective leg spring has at least one leg portion pointing substantially obliquely to the direction of travel and also obliquely downwards counter to the direction of travel. 
 
     
     
       2. The arrangement according to  claim 1 , wherein each respective scraper is arranged obliquely to a direction of travel of the lower run at an angle in the range of 25° to 55°. 
     
     
       3. The arrangement according to  claim 1 , wherein the leg springs mounted on each respective scraper are formed substantially identically or are oriented in the same direction. 
     
     
       4. The arrangement according to  claim 1 , wherein the upper leg-spring end is connected in an articulated manner to the front or rear end portion of the scraper. 
     
     
       5. The arrangement according to  claim 1 , wherein the lower leg-spring end is rotatably inserted into a bore formed in the transverse strut, and wherein a longitudinal axis of the bore extends obliquely to vertical line. 
     
     
       6. The arrangement according to  claim 1 , wherein the upper leg-spring end is formed in a shape of an eye. 
     
     
       7. The arrangement according to  claim 1 , wherein each respective scraper is tilted about its longitudinal axis relative to the plane of the underside of the lower run, and wherein the angle between the underside of the lower run and the central longitudinal plane of the scraper is in the range of 95° to 115°. 
     
     
       8. The arrangement according to  claim 1 , wherein the upper leg-spring end encloses an angle in the range of 95° and 120° with the at least one leg portion of the leg spring pointing substantially obliquely to the direction of travel and obliquely downwards counter to the direction of travel. 
     
     
       9. The arrangement according to  claim 1 , wherein each respective leg spring has at least one resilient winding and two leg portions pointing substantially obliquely to the direction of travel and obliquely downwards counter to the direction of travel. 
     
     
       10. The arrangement according to  claim 9 , wherein the at least one resilient winding is integrated between the two leg portions pointing substantially obliquely to the direction of travel and obliquely downwards counter to the direction of travel. 
     
     
       11. The arrangement according to  claim 1 , wherein the lower leg-spring end encloses an angle in the range of 110° and 120° with the at least one leg portion of the leg spring pointing substantially obliquely to the direction of travel and obliquely downwards counter to the direction of travel.